EP2523297A1 - Dispositif de gestion de l'alimentation pour permettre aux circuits électroniques d'un équipement sous-marin d'être en permanence alimenté par le courant - Google Patents

Dispositif de gestion de l'alimentation pour permettre aux circuits électroniques d'un équipement sous-marin d'être en permanence alimenté par le courant Download PDF

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Publication number
EP2523297A1
EP2523297A1 EP11305551A EP11305551A EP2523297A1 EP 2523297 A1 EP2523297 A1 EP 2523297A1 EP 11305551 A EP11305551 A EP 11305551A EP 11305551 A EP11305551 A EP 11305551A EP 2523297 A1 EP2523297 A1 EP 2523297A1
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EP
European Patent Office
Prior art keywords
electronic circuit
current
control board
voltage
submarine equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11305551A
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German (de)
English (en)
Other versions
EP2523297B1 (fr
Inventor
Thierry Verhaege
Rodolphe Boulon
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Alcatel Lucent SAS
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Alcatel Lucent SAS
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Publication date
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Priority to EP20110305551 priority Critical patent/EP2523297B1/fr
Publication of EP2523297A1 publication Critical patent/EP2523297A1/fr
Application granted granted Critical
Publication of EP2523297B1 publication Critical patent/EP2523297B1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/50—Systems for transmission between fixed stations via two-conductor transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/04—Constant-current supply systems

Definitions

  • the present invention relates to submarine equipments that are used in submarine (tele)communications.
  • Some submarine equipments such as branching units, repeaters, active filters, or optical switches, comprise one or more electronic circuits that are mounted in series between first and second pins, between which a main current flows.
  • Some of these electronic circuits offering at least one function that may be requested at any time, need to be fed continuously with current to be capable of maintaining a continuous service and/or immediately carrying out a function that has just been requested.
  • a submarine branching unit which comprises at least three terrestrial terminals (A, B, C) electrically coupled by submarine cables respectively to three terrestrial equipments (E A , E B , E C ) and a sea terminal (M) electrically connected to a sea electrode, is intended to couple two of the three terrestrial terminals (for instance A and B) to define a trunk segment between their corresponding terrestrial equipments (for instance E A and E B ) and a third one of the three terrestrial terminals (for instance C) with the sea terminal (M) to define a branch segment between the corresponding terrestrial equipment (for instance E C ) and the sea electrode.
  • These couplings define a requested configuration that may change at any time.
  • an electronic circuit of the submarine branching unit comprises a control board that receives the configuration requests and activates one or several relays controlling the couplings in consequence.
  • the relay activation disturbs, continuously or at least transitorily, the power sources that are available at the different terrestrial and sea terminals (on the input side), which makes difficult ensuring an adequate current feeding of the control board and the relay coils that belong to the electronic circuit and are intended to activate the relays.
  • some embodiments of the invention aim at allowing a power management of submarine equipments that is intended to render them simpler and/or more reliable and/or subject to lower thermal loads.
  • An embodiment of the invention comprises a power management device, intended for equipping a submarine equipment comprising at least one electronic circuit mounted in series between first and second pins, between which a main current is intended to flow when in use, and comprising an inductance, mounted in series with the electronic circuit between the first and second pins and arranged for storing energy to maintain a current temporarily when a main current drop occurs, and a free-wheel diode, mounted in parallel with the electronic circuit and inductance between the first and second pins and arranged for allowing the maintained current to loop back toward the electronic circuit in order to maintain a continuous current supply to the electronic circuit.
  • This power management device may further comprise a voltage limiter mounted in parallel with the inductance to protect it against possible surges.
  • the power management device may further comprise an auxiliary diode mounted in opposition with the voltage limiter to force the maintained current to flow through the free-wheel diode instead of flowing through this voltage limiter.
  • Another embodiment of the invention comprises a submarine equipment comprising, on the one hand, at least one electronic circuit mounted in series between first and second pins, between which a main current is intended to flow when in use, and, on the other hand, a power management device such as the one above introduced.
  • This submarine equipment may include additional characteristics considered separately or combined, and notably:
  • Embodiments of the invention aim at providing submarine equipments BU with a power management device D that may be parts of (tele)communication infrastructures (or systems).
  • the submarine equipment BU is a branching unit.
  • the invention concerns any type of submarine equipment comprising at least one electronic circuit Cj that needs to be fed continuously.
  • the submarine equipment could be also a repeater, an active filter or an optical switch, for instance.
  • a branching unit BU may comprise more than three terrestrial terminals Tk (for instance four or five), and/or more than one sea terminal ST (for instance two or three).
  • a submarine equipment that is concerned by the invention may comprise one terrestrial terminal Tk, coupled to a terrestrial equipment TEk through a cable, and a sea terminal ST, connected to a submarine cable, or two sea terminals, connected respectively to two submarine cables.
  • the branching unit BU may comprise one or more other electronic circuits Cj' (j' ⁇ 1) intended to implement at least one function.
  • the branching unit BU comprises a second electronic circuit C2 mounted in series between the first electronic circuit C1 and the inductance IN.
  • the second electronic circuit C2 may comprise an optical amplifier OA that may be mounted in parallel with a voltage limiter VL5 to be fed in current at a chosen constant voltage.
  • This second electronic circuit C2 may also comprise a modulator intended for modulating the optical power to transmit information to at least one of the terrestrial equipments TEk. It is important to note that a second electronic circuit C2 may offer other functionalities than an optical amplification and/or an optical modulation. Indeed, it may be of any type as long as it requires a continuous feeding.
  • the branching unit BU further comprises a power management device D that is intended to provide the electronic circuits Cj with a transient current during each reconfiguration of the connections between terminals Tk and ST, so that they could be really fed continuously.
  • This (power management) device D comprises at least an inductance IN and a free-wheel diode D1.
  • the inductance IN is mounted in series with the electronic circuits Cj between pins P1 and P2. It is arranged for storing energy when it is fed with the main current (i.e. once a requested terminal configuration has been defined), in order to be capable of maintaining a current temporarily (i.e. producing a transient current) when a drop (down) of this main current occurs (for example during a terminal reconfiguration).
  • the free-wheel diode D1 is mounted in parallel with the electronic circuits Cj and inductance IN, between the first P1 and second P2 pins. It is arranged for allowing the maintained (or transient) current (produced by the inductance IN) to loop back toward the electronic circuits Cj so that they could be fed continuously.
  • the inductance IN produces a maintained (or transient) current that is looped back with the aid of a free-wheel diode D1 to maintain for a while a current through the electronic circuits Cj.
  • the device D may further comprise a voltage limiter VL1 mounted in parallel with the inductance IN to protect the latter against possible surges.
  • this voltage limiter VL1 may be a Zener diode.
  • the device D comprises such a voltage limiter VL1
  • the first electronic circuit C1 When the first electronic circuit C1 is intended for controlling the interconnections between terminals Tk and ST, as illustrated, it comprises at least electronic components (RCp, TRp) and a control board CB.
  • the control board CB is arranged for receiving instructions from at least one of the terrestrial equipments TEk and for producing control signals depending on these received instructions or on instructions locally generated. These control signals are intended for controlling indirectly the relays Rn to define a requested configuration.
  • the first electronic circuit Cj may comprise a voltage limiter VL2 mounted in parallel with the control board CB and arranged for allowing this control board CB to be fed at a chosen constant voltage.
  • this voltage limiter VL2 may be a Zener diode.
  • control board CB switches on (or alternatively off) the transistors TRp that allow to power (or alternatively depower) the relay coils RCp.
  • the electronic components may be grouped into groups that are each associated to one or several relays Rn, comprises a relay coil RCp and a transistor TRp that are mounted in series.
  • Each transistor TRp of a group controls the state of the associated relay coil RCp depending on the corresponding control signal produced by the control board CB.
  • These transistors TRp may be of the MOSFET type, for instance. In this case, when the gate potential is equal to the source potential, the gate-source circuit is "open” and the relay coil RCp is not fed, and when the control board CB applies a low voltage (typically several Volts) between the gate and the source, the drain-source circuit is "closed” and the relay coil RCp is fed.
  • the relay coils RCp need only to be fed for short periods of time (typically 10 ms or so), in order to change a configuration (through latching relays Rn (that are each controlled by two relay coils)), or to allow a transient configuration (typically during a make-before-break phase). So, it is possible to sequentialize the relay coils activation, or at least to limit the number of coils RCp to be fed at the same time, to prevent current insufficiency. Therefore, the transistors TRp are generally switched off, but switched on for short periods (during each reconfiguration) under control of the control board CB.
  • these groups of electronic components are mounted in parallel with the control board CB, so that the control is simplified (due to the sharing of the same source potential reference) and the global voltage drop is minimum.
  • the first electronic circuit C1 comprises a resistor R mounted in series with its control board CB, between the latter (CB) and the first pin P1.
  • the resistance value of this resistor R is chosen so that the current through it exceeds the current that is required by the control board CB, but remains small compared to the main current. In other words, this resistor R allows the control board CB to be fed with a current and voltage that are smaller than the current and voltage needed by the relay coils RCp.
  • the first electronic circuit C1 may comprise advantageously a voltage limiter VL3 mounted in parallel with the groups of electronic components (RCp, TRp) and arranged for providing a chosen first voltage V1 which is intended to be applied to a relay coil RCp during a terminal reconfiguration (i.e. when demanded by the control board CB).
  • this voltage limiter VL3 may be a Zener diode.
  • the first electronic circuit C1 may further comprise an auxiliary transistor ATR mounted in series with the voltage limiter VL3 and controlled by a control signal received from the control board CB, and an auxiliary voltage limiter VL4 mounted in parallel with this auxiliary transistor ATR and arranged for increasing (or boosting) the first voltage V1 when demanded by the control board CB.
  • the voltage limiter VL3 is continuously fed while the auxiliary voltage limiter VL4 is only fed transitorily.
  • This auxiliary voltage limiter VL4 is a small equipment which does not induce losses in permanent running.
  • the auxiliary transistor ATR is generally switched on, but switched off when a voltage boost is required.
  • the voltage available for coil feeding is the sum of the first voltage V1 and the auxiliary voltage provided by the auxiliary voltage limiter VL4.
  • the auxiliary voltage limiter VL4 does not increase the branching unit's voltage drop and thermal load.
  • this auxiliary voltage limiter VL4 may be a Zener diode.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
EP20110305551 2011-05-09 2011-05-09 Dispositif de gestion de l'alimentation pour permettre aux circuits électroniques d'un équipement sous-marin d'être en permanence alimenté par le courant Active EP2523297B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110305551 EP2523297B1 (fr) 2011-05-09 2011-05-09 Dispositif de gestion de l'alimentation pour permettre aux circuits électroniques d'un équipement sous-marin d'être en permanence alimenté par le courant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110305551 EP2523297B1 (fr) 2011-05-09 2011-05-09 Dispositif de gestion de l'alimentation pour permettre aux circuits électroniques d'un équipement sous-marin d'être en permanence alimenté par le courant

Publications (2)

Publication Number Publication Date
EP2523297A1 true EP2523297A1 (fr) 2012-11-14
EP2523297B1 EP2523297B1 (fr) 2014-03-05

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Application Number Title Priority Date Filing Date
EP20110305551 Active EP2523297B1 (fr) 2011-05-09 2011-05-09 Dispositif de gestion de l'alimentation pour permettre aux circuits électroniques d'un équipement sous-marin d'être en permanence alimenté par le courant

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5446392A (en) * 1993-02-10 1995-08-29 Fujitsu Limited Submarine equipment and fault locating method for a submarine communication system
EP1220468A1 (fr) * 2000-12-27 2002-07-03 PIRELLI CAVI E SISTEMI S.p.A. Unité de branchement de câble sous-marin avec limiteur de courant
US6987902B2 (en) 2003-02-11 2006-01-17 Alcatel Branching unit with reconfigurable terminal connections

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5446392A (en) * 1993-02-10 1995-08-29 Fujitsu Limited Submarine equipment and fault locating method for a submarine communication system
EP1220468A1 (fr) * 2000-12-27 2002-07-03 PIRELLI CAVI E SISTEMI S.p.A. Unité de branchement de câble sous-marin avec limiteur de courant
US6987902B2 (en) 2003-02-11 2006-01-17 Alcatel Branching unit with reconfigurable terminal connections

Also Published As

Publication number Publication date
EP2523297B1 (fr) 2014-03-05

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